O

Object: A software structure which represents an identifiable item that has a well-defined role in a problem domain.

Object Orientated: An adjective applied to any system or language that supports that use of objects.

Objective: The purpose of the specific test being under taken.

Operational Testing: Testing [erformed by the end-user on the software in its normal operating environment.

Oracle: A mechanism to produce the predicted outcomes to compare with the actual outcomes of the software under test.

Outcome: The result or visible effect of a test.

Output: A variable (whether stored within a component or outside it) that is written to by the component.

Output Domain: The set of all possible outputs.

Output Value: An instance of an output.